<!DOCTYPE html>
<html lang="zh_CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script type="text/javascript">
    var string = 'ABCbc';
    console.log(string.toUpperCase()); // 可以把字符串转换为大写
</script>

</html>
